Valve fitting and siphon tube



July 8, 1952 J. H. s'rRooP 2,602,463

VALVE FITTING AND sTPHoN TUBE Filed May '7, 1946 l Il I N VEN TOR.

Patented July 8, 1952 RATE-NYT.; ossifceqjf 'vAnyEFETTISIPHQNTUBE*f l l. Johndirtroomrblest YrliiNirX-rassigncntoLSnW-e -V Belleville,e

Animar-influent, leccese-nainesssneoiffn This invention relatestomeamszforzccntrcllihg the dischargev of fluid media under pressure, and, mime.A particularly; to; discharge v.headeon l,valves .fonfhighipressureffiuid mediafcontainers;

Containeravcommonlyrknown-as: cylindersfor-x high: lpressure 1iiuidzimedia; such. as.y carbon-.dioxide and theilike areprovided.with a; threadedaopeningv in the neck thereof-finto." which fthe? threaded shank 'or a :disc hargne-.lieactV -orf4 valve.: is 'tightly screwed; i' Primal:atoryY tdrefillinga cylinder,` 4it f customary-to z-remoyezthergvalre;.f-cleantand; inn spectithevinterior.ofgthef. cylinder and. the` .valve -andscrew-thefvalreintothenpeningagain inca thczshanlcof zthe. yalve tightly; lodged. in: fthe cylinders-opening, a considerableftordue sire-,-

quired-ito:unscrewvthesamere Usually; this is :ac-l comnlishedby: holding ,thezcylinderfina vise; :applyingiachuck.adapted,toireceive thavalre; and rotatingzthechuckfbymeansofaa lathe.. 1 -ln-.many

y cylinder.

Other and further objectsofthe invention will be' obvious .upon an understanding of the illustrative embodiment aboutJ` to be described, or willtbev indicated in theappended c1aim, and various .advantages not referred to herein. will.- occur toone skilled in theart upon employment of' the invention in practice.

A preferred embodiment of the invention has been chosen for purposes of illustration and description and is shown in the accompanying drawing, forming a part of the specification,

wherein:

Figure 1 is a fragmentary elevational view, partly in section, of a valve in accordance with the invention shown as applied to a container.

. l1 claim; (CL-Liesegan- Referring.` to :thedrawing, Ythere: is: shown a portion ofv ai containeri oracylindere'l foiestoring fluid media under pressure,. -..suchr.as:carbon dioxide, hai/ing athreaded-opening H inthe-,neck I2 thereof.; ak dischargezheadorvalve'ld mounted onthe, cylinder-,fv a .carrying handle I5 .securedto -the.: valve.I and, valve;- operating means: :I S. supported by theihandle..

VTheryalvehas;a hndyz-ory housing comprisingan upperfsection. 11.1. and a- ,lower-:section: I3. detachably l 'secured' i together by:- cooperating; "screw threads 2.0.x, The...lowensectionmas: a` threaded nipple oreshankziportionl Il remoyably secured .in the opening Il and: hasfa non-vcircularv longitudinally extendingbore; 22.,- preferably hexagonal inzcrossrsection (Figure 2).', providingza. wrench receiving .portion tol :facilitate securementl and removal zoithelowenvalve section.-V

A. shoulder- 2311 isprovided' above: the; vbore .22

. for'seainga flange-'24; lorirthez-.upper end; of; a

syphon:tubev l2 5 extending through the. ,-bore; -to 'the bottom-ofthe containerxy The syphon ltube has a.mon-.circular. .enlarged portion 26j at@ its upper'fendconforming to the shape .of thepbore and isforxned with an inwardly:extending'shoulder-213 thepurpose of which'wilLbe-.deseribed hereinafter:

The upper section Il of the.: valvepbody comv prisesza yalvevchamber-; a longitudinally extendingbore. 3l proyidedatgits upper-end with a piston, cylinder 32, .a valverseatz 4v surrounding l thezlower end ofsthebore 3i, and .an outlet-conduit .di in' fluid communication .withV thebore 3|.;intermediatethe cylinder 32. and the seatA 34. The diameter of the-piston cylinder may be equal to orgatsleastrno greaterfthan theY diameterof thee-bore. adjacent'lthe seat, but-:preferably is slightly vsmaller/.asshown.

A valve and p-iston assembly@ forvcontrolling the dischargel voftiluid pressure medium-'fromA the cylinder comprises a main valve member-41101 fthe-seat 34, a piston 42y disposedin thecylinder 32, and a stem QSI-connectingfthe:valvememberand thepiston. The-stem has a bore 44 extending therethrough formed with a pilot valve port 45 in the main valve member for establishing fluid flow communication between the valve chamber 3d and the piston cylinder 32. A pilotvalve member 46, seated in a anged cup 41, is urged towards its port 45 by a cylindrical spring 49 compressed between the flange of the cup 41 and the shoulder21 of the syphon tube.

'escape of fluid medium therethrough. I upon releasing the trigger mechanism, the aper- A loosely iitting rod 50 is slidably disposed in the bore 44 of the piston and valve assembly and carries an apertured cap member at its upper end extending through a packed aperture 52 in the top wall of the upper section l1.

The cap member 5| is adapted to be moved downwardly by the operating means i6, herein illustrated 'as 'a trigger mechanism having an arm 54 for engaging the cap member, whereby the rod 50 is moved downwardly to unseat the pilot valve member 46.

In operation, upon unseating of thepilot valve member, pressure medium from the valve chamber 3D is conducted to the piston cylinder and-is effective to substantially balance thepress'ure acting on both sides of the main valve member 4l, whereby unseating of the main valve member 4 that the present invention provides an improved Valve which is simple in operation, is extremely compact in arrangement and is readily secured to and removed from the cylinder. It will be noted that the valve body sections can be made from castings which are machined by simple drilling, boring and threading operations readily 3 performed by automatic" machines; 'r' The piston requires only a slight force. VSuch unseating oi` the main valve memberY is eiected by further operation of the triggerinechanism which causes the cap member to engage the'top of the valve arid piston assembly to move the assembly downwardly, whereby pressure medium is discharged from the cylinder El) by way of the syphon tube 25,'the valve chamber 39',

outlet conduit 35.

the bore '3l and the During the 'foregoing operation, the aperture of the cap member 9i is fsealed to prevent the However,

ture in the cap member 5I is adapted to vent the fluid medium in the piston cylinder to reduce its pressure, whereby the combined forces of the medium acting on the main land pilot valve members and ofY the spring 49 effect seating of the pilot and main valve members to stop the discharge of the pressure medium. v

. The valve preferably is assembled by screwing the lower body section i9 into the neck opening of the cylinder l0 with the aid 'of a wrench or tool tted into. the non-circular bore '22. The

' syphon 25 is then inserted 'and positioned with its flanged on the shoulder 23 and the spring 49 is fseated on the shoulder '27 with' thecup @l containing the pilot valve member d6 in turn seated on the spring 49. The cap member 5| the rod 59 and the piston and vvalve assembly 40 are placed in the Vupper valve body section li and this section is screwed to the lower section I9.

The handle l5 containing the operating means I6 then is attached to valve body.

In order to remove the valve for inspection and for inspection and cleaning' ofthe cylinder, the foregoing steps areperformed irl-reverse order. Since the syphon tube is readily'reinoved to permit access to the cylinder opening, it is not necessary in every instance to remove the lower valve body section. However, if removal of the latter is desired," this is readily accomplishedby 'again'inserting a wrench vor tool in the bore 22 and unscrewing the lower section. .Such unscrewing, by reason of the wrench being applied internally over a wide area along the length of the bore, will not subject the lower section to exces- Asive torsional strains tending to twist or otherwise damage the valve body section.

-From the foregoing description, it will be seen can readily withstand any rough usage to which it may be subjected.

As various changes may be made in the form, construction and arrangement of the parts herein, 'without departing from the spirit and scope of the invention and without sacricing any of its advantages, it is to be understood that all matter herein is to be interpreted as illustrative and not in any limiting sense.

I claim:

In a valve, a valve' body comprising upper and lower sections, said upper section having an externally threaded portion at the Alower end thereof, said lower section having an externally threaded shank at the lowerend thereof forremovably securing the same finto a threaded containerl opening and having a bore extending longitudinally therethrough, said bore being provided with a polygonal cross-sectioned portion adjacent the lower end for receiving awrench for effecting securement and removal 'of said lower body section with respect tothe container andv being-provided with an enlarged internally threadedportion adjacent the upper end for removably securing the threaded portion o1" said upper'body section to said lower body section and being provided with an intermediate upwardly facing annular shoulder; and a syphon tube having a polygonal cross-sectioned enlarged portion at the upper end thereof disposed in said polygonal bore portion and provided with a ilange'at its'u'p'per end supported on said sl'ioul-der.`

Y Joint n. s-'rnoor A REFERENCES CITED The following references are of 'record in the le of this patent:V

UNITED STATES PATENTS Number Name Date 650,413 ONeill May 29, 1900 710,674 Fassman Oct. 7, 1902 1,037,680 Spitze'nberg Sept.` 3,1912 1,132,886 Stewart Mar. 23, 1915 1,324,206 Nickell Dec. 9, 1919 1,589,786 Bradshaw June 22, 1926 1,836,384 Mohr Dec. 15, 1931 2,019,404 Eugster Oct. 29, 1935 2,172,073 Smith Sept. 5, 1939 2,273,856 Freygang Feb. 24, 1942 2,836,282 Mueller Dec. 7,1943

2,363,943 Carlson Nov. 28, 19514 2,372,392 Pletman Mar. 27, 1945 2,408,541 Wilson Oct. l, 1946 

